Members of Australia’s Orthodox Jewish community who assist police investigating alleged child sexual abuse have been pressured to stay silent, secret tape recordings and emails obtained by Fairfax Media reveal.

The details of the pressure being exerted on victims have emerged as the Royal Commission into child sex abuse prepares to hold public hearings next week to examine the responses of Melbourne and Sydney’s yeshivah centres to alleged offences dating back to the 1980s.

In one secret, legally recorded 2011 telephone conversation, prominent Melbourne criminal lawyer Alex Lewenberg tells a victim of St Kilda Yeshivah centre sex offender David Cyprys he should not have co-operated with police.